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Fabrication of CdTe QDs/BiOI-Promoted TiO 2 Hollow Microspheres with Superior Photocatalytic Performance Under Simulated Sunlight.
Nanoscale Research Letters 2019 Februrary 7
Hollow and heterostructured architectures are recognized as an effective approach to improve photocatalytic performance. In this work, ternary TiO2 /CdTe/BiOI with hollow structure was constructed via a step-by-step method. In addition, the effect of TiO2 structural regulation and the energy band alignment of BiOI and CdTe quantum dots (CdTe QDs) with TiO2 in TiO2 /CdTe/BiOI on photocatalytic dye removal were also studied. The results reveal that the TiO2 /CdTe/BiOI heterostructures with hollow substrates exhibit much higher photocatalytic activities than pure TiO2 , P25, TiO2 /CdTe, and TiO2 /BiOI and ternary TiO2 /CdTe/BiOI with solid substrates. For TiO2 (H)/CdTe/BiOI, several synergistic factors may be responsible for the remarkable visible-light photodegradation performance, such as strong visible-light absorption by BiOI and larger specific surface area.
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